This unique high-quality mug not only keeps a satisfying amount of your favourite beverage cold for hours at a time, it's dishwasher safe! Convenient no spill slide top has opening for drinking with or without straw.Fact: Big Gulp mugs are made in a factory with an unheard of Food Safe Factory Rating of 97%, and is the #1 employer of people with disabilities in the Tristate area.It's always good to know the product you're buying is made under superior conditions.